yeah, the predator chose to fight 1) unarmed (he did use wrist blades, but only after he beat the crap outta dutch) 2) uncloaked and 3) the pred gave dutch time to prepare... and 4) minus his helmet. Now, the helmet part might not seem like much at first... but YOU try fighting somebody for a good 5-10 minutes holding YOUR breath. Its pretty hard to hold your breath for half that, NOT DOING ANYTHING. Also, without his helmet, the predator is basically blind, his eyesight is SO bad.
I don't really think so... i mean, im a punisher fan and all, but "realistically" (i know, its comics and aliens) the punisher wouldn't stand much of a chance. I mean, the entire squad (minus 2 who died) unloaded on the pred who was only a good 15 m away. "nothing coulda survived at that range." Yet, the pred only took one bullet to the theigh..
really, with the ability to basically turn invisible, to leap 25 feet straight up (even further horizontally), being probably 2 to 5 times stronger, incredible speed and agility, and have an entire arsenal of heat seeking weapons that are almost always 1-hit kills, the punisher just seems a bit outclassed in every way...
i dont think the predator was holding his breath when he took of his helmet...he was still roaring and laughing and stuff....i think they can live in earth's atmosphere...in AVP and Predator 2, they went without helmets for quite a long time...in Predator 2 he didnt wear a helmet for like 35 minutes....and he screamed and sh!t, looked like he was breathing to me